ZXLD1322

更新时间： 2024-11-29 03:07:19

品牌	Logo	应用领域
捷特科 - ZETEX		转换器驱动
页数	文件大小	规格书
18页	352K
描述
Buck/boost mode DC-DC converter for LED driving with 700mA output and current control

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ZXLD1322 数据手册

ZXLD1322

Buck/boost mode DC-DC converter for LED driving

with 700mA output and current control

Description

The ZXLD1322 is an inductive DC-DC The feedback control circuitry inside the

converter, with an internal switch, designed ZXLD1322 provides excellent load and current

for driving single or multiple LEDs in series up regulation, resulting in very stable LED current

to a total of 700mA output current.

over the useful life of the battery and over the

full operating temperature range.

Applications cover input voltages ranging

from 2.5V to 15V. Depending upon supply The LED current can be adjusted from 100%

voltage and external components, this can down to 10% of the set value by applying a dc

provide up to 12W of output power.

voltage to the ADJ pin and down to 1% by

applying a PWM signal. An on-chip LED

protection circuit also allows output current to

be reduced linearly above a predetermined

threshold temperature using an external

thermistor at the TADJ pin.

The device employs a variable 'on' and 'off'

time control scheme with adjustable peak

switch current limiting and operates in Buck/

Boost mode, offering higher power efficiency

and lower system cost than conventional PFM

buck/boost circuitry.

External resistors set nominal average LED

current and coil peak current independently.

The device includes the DC-DC converter, a

high-side current monitor and an NPN The device can be shut down by applying a

switching transistor to provide an integrated continuous low level dc voltage to the ADJ pin.

solution offering small PCB size, competitive

cost/performance, high power efficiency of

DC-DC conversion and maximum LED

brightness/reliability. More importantly, it

retains design flexibility to add customer

specific features.

Features

Applications

•

2.5V to 15V Input Voltage Range

•

High power LED flashlights

LED back-up lighting

Up to 700mA output current

Typical efficiency >80%

General LED lighting

User-defined thermal control of LED

output current using external thermistor

•

High output current stability over input

voltage and temperature

•

12µA typical standby current

LED current adjustable from 100%

down to 2%

•

Adjustable Soft-Start

Capable of driving 3 LEDs in series

Note^#: Using standard external components as specified under electrical characteristics. Efficiency is dependent upon

external component types and values. Higher efficiency is possible with alternative coils.

Issue 1 - January 2008

www.zetex.com

12 3 4 5 6 7...18

中文翻译

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与ZXLD1322相关器件

型号	品牌	获取价格	描述	数据表
ZXLD1322DCCTC	DIODES	获取价格	BUCK/BOOST MODE DC-DC CONVERTER
ZXLD1322DCTC	ZETEX	获取价格	Buck/boost mode DC-DC converter for LED driving with 700mA output and current control
ZXLD1350	ZETEX	获取价格	350mA LED driver with internal switch
ZXLD1350	DIODES	获取价格	30V 350mA LED DRIVER with AEC-Q100
ZXLD1350_07	ZETEX	获取价格	350mA LED driver with internal switch
ZXLD1350ET5TA	ZETEX	获取价格	350mA LED driver with internal switch
ZXLD1350EV3	ZETEX	获取价格	circuit diagram and bill of materials
ZXLD1350Q	DIODES	获取价格	AUTOMOTIVE COMPLIANT 350mA BUCK LED DRIVER
ZXLD1350Q_17	DIODES	获取价格	AUTOMOTIVE COMPLIANT 350mA BUCK LED DRIVER
ZXLD1350QET5TA	DIODES	获取价格	LED Driver,

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